Yes, yes it will.
In fact, every law or provision which is mentioning EU legislation will have to be combed through and considered, or if not, UK law will end up being 40 years out of touch with reality, and Parliament will have to play a lot of catch up.
Of course, all laws about internal matters can be left as is, but everything interacting with the EU or with other entities which previously interacted with the UK through the EU, must be looked at.
How about a hypothetical example of a bank in the UK which is handling pension savings for a company in Austria? Perhaps they have a 8-year contract about it, with several clauses about reparations if one of them withdraws from the deal. Maybe the pensions are invested in long-term instruments which can't be sold within the next five years.
What will they do when the UK leaves? Who will cover the costs of ending this deal? Will any of the withdrawal clauses be invoked, so should any of them pay for damages? Should the bank dump the assets at any price so they can return the pension money the company invested with them? If not, who covers the extra costs of transferring the final returns back into the EU in five years time? Should the bank and the company deal with this themselves? Should the UK government and the EU help? How?
Or another hypothetical example: A UK company which makes a special type of heat treated material for a German car factory. Their product is advanced, but not unique, so they do have competition in France. They got the contract because they were marginally cheaper for the customer, which matters with the big volume they are trading. The contract is for 10 years, with an option of renewal, so the UK company has invested in a bigger production line to be able to deliver more products and make more profits.
What happens to them when the UK leaves? Obviously the German company can switch suppliers and go with the French company if the UK one is too expensive after tariffs, but that assumes that the French company has the available capacity, or will have it in time. Good manufacturers have very tiny stockpiles of parts these days, and rely on a continuous flow of parts from their suppliers. Who covers the costs if the UK company can't deliver for a few days, because a problem in customs? And if the UK company loses business in the EU because their marginal cost becomes higher than their competitors inside the EU, what will they do with the expanded capacity? Will the UK government cover their losses for their investment?
"Minor tidying up" doesn't even begin to cover all the questions and dilemmas which arises with the UK leaving. It is fully legal and fully possible of course, but it's going to be a lot of work, and you still have no plans!
Just two years to negotiate about everything and solve all the problems sounds certifiably utopian.
Well I am pleased you are identifying real issues arising from Brexit rather
than the persistent sour grapes negativity from other Remainers.
But in neither of your two examples are the parties to the contracts
governments or the EU Commission; so there is no requirement for
the UK government or EU government to negotiate on this.
I am not an expert on pensions or heat resistant materials and
without sight of the contracts or even knowing what the governing
law is for each of them, I could only comment in the most general terms.
For long time contracts, facts (externalities) frequently change.
These may be new taxes, changes in eligibility for taxes, changes
to taxation rates or fluctuations in currency exchange e.g. pound sterling.
The contracting parties typically either provide specifically for examples of
such in the contract clauses, or have an inbuilt contract change variation
procedure that can address the issues. Failing that a healthy relationship
management can agree changes or even, if required, termination.
It has been known for over a year that the UK was very likely to have a
referendum for which there was a substantial possibility of a leave vote.
I.e. the lawyers have had plenty of time to think of this.
Although I would hope for exit on 1st April 2017, I have little confidence
in the UK politicians having the competence sorting it out in that time.
There is therefore probably at least a further year or two for the parties to
find a solution.
Considering the heat resistance material for cars.
First of all the EU might adopt the policy not to impose a customs tariff
or Secondly if it does apply that might only apply to goods provided under
contracts placed after a specific date e.g. 23 June 2015. Thirdly it might
apply only to orders placed after a certain date or Fourthly only to goods delivered
after a certain date or Fifthly only to invoices submitted after a certain date.
The EU has at least five choices that it can make unilaterally.
The UK can simply mirror that.
But assuming worst case, EU tariffs are to apply; the question is was the
order price placed for the UK factory door (in which case the German company
would be liable) or placed for delivery to the German factory (in which case
the UK company would likely be liable). In either instance the fall in the pound
is such that it would absorb some of the duty. If the French manufacturer
has not got the capacity, the German carmaker would likely leave the business
with the UK company. If the French manufacturer has the capacity, the German
car maker would likely threaten to invoke a break provision and require the UK
company to demonstrate that it could still provide best value for money.
If the UK company loses the business, it might look to other companies in the UK
or outside the EU to purchase its heat resistant material. After all if the EU puts
a tax on UK components, the UK may put an equivalent tax on EU components so
there would be UK car making companies similarly looking for duty free components.
There is no reason why the UK government should compensate the company.
My reasoning is that the impact of a modest duty is, apart from some clerk filling
in an online form somewhere, no different from a foreign exchange fluctuation.
I suspect there may be a few instances where the Bank of England may be
encouraging banks to provide overdraft facilities for circumstances arising from exit.
For instance a UK body in receipt of a grant for scientific research may find that while
the UK government may be prepared in principle to take over funding it, there would
likely be a due diligence delay during which cash flow might become critical.
Considering the Austrian company pension savings at the UK bank.
Unless the EU courts rule that merely by dint of a UK exit, the contract becomes
unlawful, perhaps under some rule that states that Austrian pension funds can only place
saving with Austrian or EU banks, and that is retrospectively applied to money already
passed over to the care of the bank, I imagine the existing contract would continue.
But if the Austrian company wish to continue the arrangement with further funds,
then the UK bank would likely have to create a wholly owned and guaranteed
subsidiary in an EU member state such as Austria (that would comply with EU rules
on accounting, pay EU taxes etc), that the further contract would be placed with.
Yes, there are indeed many such incidences similar to your two examples, but the Brexit
process between UK and EU governments can not, and should not try to, solve them all.